Internal-combustion and hot-air engine



A. BAGNULU.

INTERNAL COMBUSTION AND HOT AIR ENGINE.

APPLICATION FILED SEPT. 23, 1919.

1,%23,7U5. Patented July 25, 1922.

UNH JTM series ALBERTO BAG-NULO, 0F TURIN, ITALY.

INTERNAL-COMBUSTION AND HOT-AIR ENGINE.

asses.

Specification of Letters Patent.

Patented July 25, 1922.

Application filed September 23, 1919. Serial No. 325,670.

To all whom it may'concern:

Be it known that I, ALBERTO BAGNULO, a subject of the King of Italy,residing at-13 Via Bogino, Turin, in the Kingdom of Italy, have inventedcertain new and useful Imrovements in Internal-Combustion and ot-AirEngines; and I do hereby declare the following to be afull, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to letters or figures ofreference marked thereon, which form a part of this specification.

This invention relates to a four-stroke internal combustion engine, inwhich the working cylinder is provided with an auxiliary vaporizing andcombustion chamber, to which the fuel is delivered, characterized by thefact that the auxiliary chamber is constituted by a small vaporizerarranged parallel to and at one side of the cylinder and in constantcommunication therewith, and is provided at its top with a fuel feedingdevice comprising a hand-controlled cock and an automatic stop valve, sothat the fuel is admitted to the vaporizer during the exhaust andsuction stroke, and may therefore completely vaporize in a space withoutair, the air necessary for combustion being introduced into thevaporizer during the engine compression stroke. a

This improved engine has a great efliciency, and is of a very sim 1e andstrong construction. The fuel striking against the highly heated surfaceof the vaporizer has sufiicient time to fully vaporize, so that when theair enters the vaporizer during compression, it is possible to obtain athorough combustion. The working cylinder is not damaged by the hightemperature of the combustion in the vaporizing chamber, as this latteris separated therefrom, while there is drawn into the cylinder an excessof air that does not prevent complete combustion; therefore an energeticcooling of the working cylinder is not required.

' In the annexed drawing is shown by way of-example a constructionalform of the engine in vertical section forming the object of theinvention.

I The vaporizing and combustion chamber 1. is chiefly constituted by asmall vessel placed laterally of and parallel with the working cylinder2, with the upper end of which it is in constant communication by meansof the passage 3. This passage 3 enlarges from the engine cylindertoward the vaporizing chamber 1. On its top 4 is axially placed theliquid fuel supply means that comprises a needle or regulating rod '5wlth conical end operated b a hand wheel 6 controlling the passage 0 thefuel into the chamber 1 through a pipe 7 an automatic ball valve 8closes the pipe 9 admitthe chamber 1 by means of a suitable source f andduring working by the heat generated by the successive combustions) isvaporized but will not burn owing to lack of air. Dun ing thecompression stroke, the air, before being drawn through the cylinder bythe piston, gradually enters the vaporizin chamber and is combined withthe file vapors that are developed therein during the exhaust andsuction and at the beginning of the compression stroke, thus effecting acomplete combustion.

The gases burnt in the vaporizing chamber will flow into the workingcylinder 2, heating the airleft therein and effecting therewith theexpansion stroke.

From the above it will be understood that the zone of the highesttemperature is completely separated from the working cylinder, as thefuel vaporization and the formation and burning of the mixture areeffected in the chamber 1. Therefore the engine is in the best workingconditions, andmoreover it is possible to maintain constantly in theengine such a high temperature that a complete vaporization of the fuelwill be as vsured.

tion therewith, and a fuel feeding device above the vaporizing chamberand disally of the cylinder and in constant communication with thecylinder by a passage 3 enlarging toward said chamber, a fuel feedingdevice above said chamber comprising a fuel regulating valve 5, anatomizing device below said valve and an automatic ball valve 8 betweenthe regulating valve and fuel supply.

In testimony that I claim the foregoing as my invention I have signed myname.

ALBERTO BAGNULO.

